LINE START PERMANENT MAGNET BRUSHLESS MOTOR

摘要

A line start permanent magnet (LSPM) brushless motor includes a stator, a rotor assembly disposed in the central opening defined by the stator. The rotor assembly includes a magnet unit and a rotor. The magnet unit is arranged along an inner circumferential surface of the stator so as to define an air gap between the stator. The rotor rotatably is coupled to a shaft such that the rotor is configured to rotate adjacent the magnet unit. The rotor includes a plurality of rotor slots, each rotor slot defining a double-cage winding that includes an upper cage and a lower cage. The double-cage winding can serve as a damper, which reduces the starting current upon rotational startup of the rotor.

主权项

1. A line start permanent magnet (LSPM) brushless motor, comprising:
a stator arranged at an inner circumferential surface of a motor body and extending longitudinally along an axis to define a central opening; and a rotor assembly disposed in the central opening, the rotor assembly comprising:
a magnet unit arranged along an inner circumferential surface of the stator so as to define an air gap between the stator; anda rotor rotatably coupled to a shaft extending through a center thereof such that the rotor is configured to rotate adjacent the magnet unit, wherein the rotor includes a plurality of rotor slots, each rotor slot defining a double-cage winding that includes an upper cage and a lower cage.